Fire-grate attachment.



PATENTED JUNE 19, 1906.

V No. 823,995.

C. DIETERLE.

FIRE GRATE ATTACHMENT.

APPLIOATION FILED MAILB, 1901..

//l I ll nzn Z a Vanessa:

ANDREW a GRAHAM (20.. vuovoumounnnms. wAsmumon. n. c,

"UNITED STATES PATENT orrion.

Specification of Letters Patent. 7

Patented. June 19, 1906.

Application filed March 6, 1901'. .SerialNo. 50,083.

. scribed and claimed hereinafter.

In the accompanying drawings, forming a.

portion of this specification, Figure 1 'is a plan view of a fire-gratewith my attachment applied thereto. ,Fig. 2 is a vertical transversesection of same. Figs; 3 and 4. are similar views showing a modificationof the invention.

Like letters refer to like parts throughout all the views. v

The improved attachment consists of a plurality of plates 01,, having anarched broad upper portion and a narrow lower portion. The shoulders 1),formed by the broad upper portions of said plates, rest on thegrate-bars 0, while the narrow lower portions extend downwardly throughthe grate. Each plate a is provided with suitable projections 6,engaging similar projections on the adjacent plates, whereby freeair-spaces are produced between the several plates at, enabling greaterquantities of air to be admitted to the fire. The plates at are bracedby means of' rods d extending through suitable holes therein and havingscrew-nuts or other fastenin means at their opposite ends; otherwise t eplates are imperforate. The advantage of the imperforate feature will beapparent when it is considered that as the current of air passesupwardly into thespace between the plates it cannot escape otherwisethan by passing through the fuel on top of the plates, whereas 'if thespace above were obstructed with fuel and the plates were per-'- foratedthe air-current would pass from that space through the plate intoanother where the egress was unobstructed. This would manifestly resultin an uneven combustion.

In Fi s. 3 and 4 a modification is shown in which t e upper edge of theplates instead of being in the form of an arch is inclined toward thecentral portion of the grate in such manner that the fuel thereon willhave a constant tendency to shifttoward the center of the grate, thuspreventing the collection of the unconsumed fuel at the sides and theformation of a dead area.

The narrow downwardly-extending portions of the plates a provide meanswhereby the heat acting on the plate is constantly transmitted downward.Moreover, a large surface is olfered to the air, whereby the plates arequickly cooled and prevented from being burned.

The devices, formed of several plates braced together, may be easilywithdrawn from and mounted on the fire-gratefor instance, one on eachside thereofthus avoiding the necessity of effecting constructivechanges. Should a plate be deteriorated, the same may be easilyreplaced.

The form or shape of the plates a may be modified. Thus Figs. 1 and 2show arched, while Figs. 3 and 4 show triangular, plates. A plurality ofplates may be cast in one piece, or the whole attachment may be cast ina single piece'of the required length.

Having fully described my invention, what I claim, and desire to secureby Letters Pat ent, is

1. In a device of the character described, the combination with thegrate-bars, of a plurality of substantially parallel verticallydisposedplates arranged upon and at each side of the grate at an angle to thedirection of the draft over said grate, each of said plates having abroad upper portion resting upon and extending above the surface of thegrate and a relatively narrow lower portion extending below therate-surface and between the grate-bars, t e upper edge of said platesbeing inclined toward the central por' tion of the grate, projectionscarried by the plates and servin to space the same apart, said platesprovi ed with holes fitted to receive tie-rods and being otherwiseimperforate, tie-rods passing through the holes in the plates, andsecuring-nuts thereon.

2. In a device of the character described, the combination with thegrate-bars, of a plurality of substantially parallel verticallydisposedplates arranged upon the grate at an angle to the direction of the draftover said grate, each of said plates having a broad upper portionresting upon and extending above the surface of the grate and arelatively narrow lower portion extending below and being otherwiseimperforate, tie-rods v passing through the series of plates, and se- IOcuring-nuts thereon.

In testimony whereof I have hereunto set my hand in presence of twoWitnesses.

CHRISTIAN DIETERLE.

Witnesses Gnooe HELLMERIOII, WM. HAHN.

